Regulators were often overpowered by blitzscaling startups, rushing for size.

請問老師，最后的分詞作哪一類狀語？

Expert 剖析有誤。

Regulators were often overpowered by blitzscaling startups, rushing for size.

【翻譯】監管機構總是忍受不了閃電式創業的企業，（由于這類企業）爭先恐后地擴大規模。

rushing for size 是目前分詞短語，作startups（創業公司）的非限制性定語，暗含著緣由，startups 是其邏輯主語。不是“結果狀語”。